Classifications

• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
  • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
  • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
  • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
  • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
  • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
  • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
  • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
  • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
  • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
  • G06F3/0428—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
  • G06F1/16—Constructional details or arrangements
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
  • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
  • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
  • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
  • G06F3/0412—Digitisers structurally integrated in a display
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
  • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
  • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
  • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
  • G06F2203/04109—FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location

Definitions

• Infrared touch module Infrared touch module, infrared touch screen and display device
• Embodiments of the present invention relate to an infrared touch module, an infrared touch screen, and a display device. Background technique
• the Touch Screen Panel With the rapid development of display technology, the Touch Screen Panel has gradually spread throughout people's lives.
• the touch screen can be divided into a resistive touch screen, a capacitive touch screen, an infrared touch screen, a piezoelectric touch screen, and a surface acoustic wave touch screen according to the principle.
• Infrared touch screens are characterized by high stability, high adaptability, long life and good characteristics, and are receiving more and more attention and application.
• the principle of the infrared touch screen is to detect and position the touch operation by using infrared rays densely in the X and Y directions.
• the structure of an infrared type touch screen is as shown in FIG. 1.
• a circuit board outer frame 1 is mounted on the front surface of the display device, and an infrared emission tube is arranged on each of the four side walls of the circuit board outer frame 1.
• the dots indicate) and the one-to-one corresponding infrared receiving tubes, and the infrared rays emitted by the respective infrared transmitting tubes (indicated by broken lines in the figure) are horizontally and vertically intersected on the same horizontal plane to form an infrared matrix.
• the finger touches the screen the finger blocks the two infrared rays passing through the touch point, and the position of the touch point can be determined by detecting the corresponding infrared receiving tube.
• the infrared array of the above structure may cause an error when identifying a plurality of touch points.
• two layers of infrared emission tubes (indicated by dots) and infrared receiving tubes two layers of infrared rays are disposed on the side wall of the circuit board outer frame 1.
• the infrared light emitted by the launch tube respectively forms two layers of infrared matrices in different directions (one of which is indicated by a broken line and the other layer is indicated by a solid line).
• four coordinate points can be determined by the first layer infrared matrix, two of which are ghost points (ie, not The point that is actually touched); four coordinate points can also be determined by the second layer of infrared matrix, two of which are ghost points; the coordinate points determined by the two layers of infrared matrix are compared, wherein the two coordinate points overlap The actual coordinates of the two touch points (represented by squares in the figure), and the other four coordinate points are ghost points (indicated by triangles in the figure).
• a plurality of touch points can be identified by the above structure, with reference to the side view shown in FIG.
• Embodiments of the present invention provide an infrared touch module, an infrared touch screen, and a display device, which are used to realize multi-touch recognition with lower cost and less energy consumption.
• An infrared touch module includes: a circuit board outer frame, an infrared emitting unit mounted on two adjacent side walls of the outer frame of the circuit board, and an outer frame phase mounted on the circuit board An infrared receiving unit adjacent to the other two sidewalls; the infrared emitting unit includes a plurality of infrared emitters on the same horizontal surface, and the infrared receiving unit includes a plurality of first infrared receivers corresponding to the infrared emitters in one-to-one correspondence Each of the first infrared receivers receives infrared light emitted by a corresponding infrared emitter in a horizontal direction; the infrared emitting unit further includes a reflector located above and/or below each of the infrared emitters, the reflector Infrared light that is directed to the reflector by each of the infrared emitters is reflected in a horizontal direction; horizontal infrared light emitted by each of the infrared emit
• An infrared touch screen provided by the embodiment of the invention includes: a display panel, and an infrared touch module disposed on a light exiting side of the display panel, wherein the infrared touch module is the infrared touch module.
• a display device includes an infrared touch screen provided by an embodiment of the present invention.
• FIG. 1 is a schematic structural view of an infrared touch screen for single-touch recognition in the prior art
• 2 is a schematic structural view of an infrared touch screen for multi-touch recognition in the prior art
• FIG. 3 is a schematic diagram of an infrared touch screen for multi-touch recognition in the prior art
• FIG. 4 is a schematic side view of a multi-touch recognition infrared touch screen in the prior art
• FIG. 5 and FIG. 6 are schematic diagrams showing the structure of an infrared touch module according to an embodiment of the present invention
• a side view of the infrared touch module is a schematic side view of a multi-touch recognition infrared touch screen in the prior art
• An infrared touch module provided by an embodiment of the present invention, as shown in FIG. 5 and FIG. 6, includes a circuit board outer frame 1, an infrared emitting unit 2 mounted on two adjacent side walls of the circuit board outer frame 1, and an installation The infrared receiving unit of the other two side walls adjacent to the outer frame 1 of the circuit board.
• the circuit board outer frame 1 is square and can be disposed on the display side of the display device.
• the infrared emitting unit 2 includes a plurality of infrared emitters 10 on the same horizontal plane (the dots in the figure)
• the infrared receiving unit includes a plurality of first infrared receivers 20 corresponding to the infrared emitters (see FIG. 7); each of the first infrared receivers 20 receives the horizontal infrared light emitted by the corresponding infrared emitters 10 (shown in dotted line in the figure);
• the infrared emitting unit 2 further includes a reflector 15 located above and/or below each of the infrared emitters, and is illustrated in Fig. 7 by the reflector 15 being positioned above each of the infrared emitters 10.
• the reflector 15 reflects the infrared light of each of the infrared emitters 10 toward the reflector 15 in a horizontal direction; the horizontal direction of infrared light (shown by a broken line in the figure) emitted by each of the infrared emitters 10 corresponds to the infrared emitter 10
• the projection of the horizontal direction infrared light (shown by the solid line in the figure) reflected by the reflector 15 at the horizontal plane has a set angle (see Figs. 5 and 6).
• the infrared receiving unit further includes a second infrared receiver 22 (see Fig. 7) that receives the horizontal direction of the infrared light reflected by the reflector.
• the first infrared receiver 20 and the second infrared receiver 22 are on different layers and are staggered in the lateral direction of the outer frame.
• each of the infrared emitters located on the same horizontal plane emits horizontal infrared light to the corresponding first infrared receiver to form an infrared matrix;
• the reflector below realizes another layer of the upper infrared emitting structure, and reflects the infrared light emitted by the infrared emitter to the horizontal direction to form another layer of infrared matrix.
• Multi-touch can be identified by the two layers of infrared matrix, and the multi-touch recognition method is realized by setting the infrared emitters on the upper and lower layers respectively as shown in FIG. 2, which can reduce the number of infrared emitters, thereby reducing the module production. Cost and energy consumption.
• the infrared emitter in the infrared touch module provided by the embodiment of the present invention may adopt an infrared radiation tube, which can simultaneously emit infrared rays in multiple directions.
• the reflector 15 can be located above or below each of the infrared emitters 10, a two-layer infrared matrix is formed in the infrared module, and two touch points can be accurately identified; the reflector 15 can also be located above the infrared emitter 10 at the same time. And below, this can form a three-layer infrared matrix in the infrared module, which can accurately identify more than two touch points. In the specific implementation, it may be set according to actual needs or the thickness of the outer frame of the circuit board, which is not limited herein.
• the reflector 15 located above and/or below each of the infrared emitters may be a mirror corresponding to each of the infrared emitters 10, ie, above an infrared emitter and / or set a mirror below. If the mirror is disposed above the infrared emitter 10, the second infrared receiver 22 is also disposed above the first infrared receiver 21, and vice versa. Preferably, the second infrared receiver 22 corresponds to the mirror, that is, one mirror corresponds to a second infrared receiver 22.
• the mirror reflects the infrared light emitted by the infrared emitter 10 into the horizontal direction of the infrared light, and the horizontal direction of the infrared light emitted by the infrared emitter 10 directly to the corresponding first infrared receiver 21 is located at a different level. These two horizontal planes should not overlap each other. Moreover, it is ensured that there is a certain angle between the horizontal direction of the infrared light emitted by each of the infrared emitters and the horizontal direction of the infrared light reflected by the reflector corresponding to the infrared emitter, that is, the directions of the two infrared lights are inconsistent.
• the angle adjustment of the infrared light reflected by the mirror can be realized by adjusting the angle of the reflection surface of each mirror.
• the fine adjustment device can be any existing adjustment device, and is not used here. Detailed.
• the reflectors 15 located above and/or below each of the infrared emitters may also be mirror strips above and/or below the respective infrared emitters on the same side wall. That is, an entire mirror strip is disposed on the side wall of the outer frame of the circuit board on which the infrared emitter 10 is mounted, and a mirror surface capable of reflecting infrared light is disposed at a position corresponding to each of the infrared emitters 10 of the mirror strip.
• the angle can be preset.
• the mirror strips are easy to mount with respect to each mirror, but the setting of the mirror angles in the mirror is relatively high.
• each of the infrared emitters may have an adjustment component that adjusts the direction of the light that emits the infrared light to adjust the angle of the infrared light after the infrared touch module is assembled.
• the reflecting surface of the reflector 15 may be disposed at an angle of 45 degrees to the horizontal plane so that the horizontal infrared light reflected by the reflector 15 and the infrared emitter 10 are directly directed to the horizontal direction of the first infrared receiver 21.
• the infrared light is parallel to each other.
• the two may not be vertical, and may be angled, and the angle is generally between 10-45 degrees.
• the embodiment of the invention further provides an infrared touch screen, comprising a display panel and an infrared touch module disposed on the light exit side of the display panel.
• the display panel may be a liquid crystal display panel, an organic electroluminescence display panel, or other flat panel display panel, or may be a cathode ray tube (CRT) display or the like.
• CRT cathode ray tube
• the infrared touch module is the infrared touch module provided by the embodiment of the invention.
• the principle of solving the problem by the touch screen is similar to the above-mentioned one type of infrared touch module, The implementation of the touch screen can be referred to the implementation of the module, and the repeated description will not be repeated.
• the embodiment of the present invention further provides a display device, which includes the above-mentioned infrared touch screen provided by the embodiment of the present invention.
• a display device which includes the above-mentioned infrared touch screen provided by the embodiment of the present invention.
• the display device reference may be made to the embodiment of the above-mentioned infrared touch screen, and the repeated description is omitted.
• an infrared touch module is disposed on two adjacent sidewalls of the outer frame of the circuit board, and an infrared receiving unit is disposed on the other two sidewalls;
• the unit includes a plurality of infrared emitters on the same horizontal plane, and the infrared receiving unit includes a first infrared receiver that receives the horizontal direction of infrared light emitted by the corresponding infrared emitter;
• the infrared emitting unit further includes a top of each of the infrared emitters and/or Or a reflector below, the reflector reflects the infrared light of each of the infrared emitters toward the reflector in a horizontal direction, and the infrared receiving unit further includes a second infrared receiver that receives the horizontal direction of the infrared light reflected by the reflector.
• Multi-touch recognition is achieved by replacing the infrared emitter with a reflector placed above and/or below the infrared emitter, which reduces the number of infrared emitters placed on the outer frame of the board, thereby reducing multi-touch recognition.
• the cost and power consumption of the infrared touch screen is achieved by replacing the infrared emitter with a reflector placed above and/or below the infrared emitter, which reduces the number of infrared emitters placed on the outer frame of the board, thereby reducing multi-touch recognition.

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• Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Human Computer Interaction (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Position Input By Displaying (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Cited By (1)

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Citations (3)

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• 2013
  • 2013-04-24 CN CN201310145678.4A patent/CN103235670B/zh active Active
  • 2013-05-31 JP JP2016509256A patent/JP6099809B2/ja not_active Expired - Fee Related
  • 2013-05-31 EP EP13854212.1A patent/EP2990917A4/en not_active Withdrawn
  • 2013-05-31 KR KR1020147014343A patent/KR101626689B1/ko active IP Right Grant
  • 2013-05-31 US US14/359,793 patent/US20150205439A1/en not_active Abandoned
  • 2013-05-31 WO PCT/CN2013/076603 patent/WO2014172959A1/zh active Application Filing

Patent Citations (3)

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